N-(2-nitro-benzyl)-methionine 在
镍镍 、 甲醇 作用下,
以
甲醇 、 sodium hydroxide 为溶剂,
反应 16.0h,
以yielding 570 gm (80% of theory) of the creme-colored crystalline compound of the formula ##STR10## which的产率得到N-(2-Amino-benzyl)-methionine
参考文献:
名称:
Sulfur-containing N-benzylamino-acids and salts thereof
Process for the preparation of sulfur-containing N-benzyl-amino acids
申请人:Boehringer Ingelheim GmbH
公开号:US04363766A1
公开(公告)日:1982-12-14
A process for the preparation of sulfur-containing N-benzyl-amino acids of the formula ##STR1## wherein X and Y, which may be identical to or different from each other, are each hydrogen or halogen; R.sub.1 is hydrogen or alkyl of 1 to 4 carbon atoms; R.sub.2 is hydrogen, alkyl of 1 to 3 carbon atoms, carboxy-lower alkyl or acyl; R.sub.3 is hydrogen or acyl; and n is 1 or 2; which comprises the steps of converting anthranilic acid or a halogenated anthranilic acid into the corresponding aldehyde, reacting the aldehyde with a compound of the formula ##STR2## wherein R.sub.1, R.sub.2 and n have the meanings previously defined, to form the corresponding Schiff's base, reducing the said Schiff's base, and recovering the reaction product.
Sulfur-containing N-benzylamino-acids and salts thereof
申请人:Boehringer Ingelheim GmbH
公开号:US04185114A1
公开(公告)日:1980-01-22
Compounds of the formula ##STR1## wherein X and Y, which may be identical to or different from each other, are each hydrogen or halogen, R.sub.1 is hydrogen or straight or branched alkyl of 1 to 4 carbon atoms, R.sub.2 is hydrogen, straight or branched alkyl of 1 to 3 carbon atoms, carboxy-lower alkyl or acyl, preferably lower aliphatic carboxylic acyl, R.sub.3 is hydrogen or acyl, preferably lower aliphatic carboxylic acyl, and n is 1 or 2; non-toxic, pharmacologically acceptable acid addition salts thereof; sulfonium salts thereof; and, when R.sub.1 is hydrogen, salts thereof formed with inorganic or organic bases or basic aminoacids. The compounds as well as their various salts are useful as mucolytics.